Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/sas/7.0.0/doc/ommodmap/node5.html
Дата изменения: Thu Jun 29 00:43:39 2006
Дата индексирования: Sat Dec 22 09:39:47 2007
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Поисковые слова: dark nebula

XMM-Newton Science Analysis System


ommodmap (ommodmap-2.15.4) [xmmsas_20060628_1801-7.0.0]

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Creating the mod-8 map

A box of size nbox is first stepped across the image and within the box a sigma clipping algorithm is used to mask out sources and any surrounding pixels affected by coincidence loss. Then the average of all remaining mod-8 tiles within a sliding box of size nbox is computed and used to produce the mod-8 map.